diff --git a/dotcom-rendering/src/web/browser/islands/doHydration.ts b/dotcom-rendering/src/web/browser/islands/doHydration.ts
index 5e26a2e5e70..ed0165e6c9a 100644
--- a/dotcom-rendering/src/web/browser/islands/doHydration.ts
+++ b/dotcom-rendering/src/web/browser/islands/doHydration.ts
@@ -48,6 +48,8 @@ export const doHydration = (
 			return { clientOnly, timeTaken };
 		})
 		.then(({ clientOnly, timeTaken }) => {
+			if (!('getEntriesByType' in window.performance)) return;
+
 			// Log performance info
 			const { duration: download = -1 } =
 				window.performance